The Complete Washington Landlord Legal Guide for 2026 (Post HB 1217)
Washington landlord-tenant law was reshaped in 2025 by HB 1217, the most significant legislative change to RCW Chapter 59.18 (the Residential Landlord-Tenant Act, RLTA) in three decades. HB 1217 added a statewide rent cap, a 90-day advance notice for rent increases, a late-fee ceiling, and a 12-year exemption for new construction with a 2040 sunset. This guide pulls the post HB 1217 framework together for 2026.
Nothing here is legal advice. It is a plain-English summary with citations to RCW and HB 1217 so you can verify any line yourself.
Small Washington landlords. The owner of a single-family rental, duplex, or small fourplex in Seattle, Tacoma, Spokane, Bellevue, Vancouver, Olympia, Bellingham, or smaller cities. Out-of-state owners managing a Washington rental remotely. Accidental landlords. New investors closing on their first Washington rental.
If your unit is in Seattle, the Seattle Just Cause Eviction Ordinance and Seattle Municipal Code overlays apply on top of state law and are stricter than the state floor. We cover the Seattle headlines below; for unit-specific compliance, consult Seattle's Department of Construction and Inspections (SDCI).
## Residential Landlord-Tenant Act overview
RCW Chapter 59.18, the RLTA, is the foundation of Washington residential landlord-tenant law. The Chapter governs:
- Landlord obligations (habitability, RCW 59.18.060).
- Tenant obligations (RCW 59.18.130).
- Security deposits (RCW 59.18.260 et seq.).
- Late fees and rent (RCW 59.18.170, post HB 1217).
- Notice for entry (RCW 59.18.150, 2 days).
- Termination (RCW 59.18.200, 59.12.030).
Eviction procedure (Unlawful Detainer) lives separately at RCW Chapter 59.12.
## HB 1217: rent cap, 90-day notice, late-fee cap
HB 1217 was signed into law in May 2025 and most provisions took effect immediately. The headline changes:
- Statewide rent cap: a landlord may not increase rent by more than the lesser of 7 percent plus CPI or 10 percent in any 12-month period (RCW 59.18.700 series).
- 90-day rent increase notice: any rent increase requires 90 days advance written notice (RCW 59.18.140, amended by HB 1217).
- No rent increase in the first year of a tenancy (RCW 59.18.700).
- Late-fee cap: $75 per month or 1.5 percent of monthly rent, whichever is greater, with a 5-day grace period (RCW 59.18.170, amended by HB 1217 Section 108).
- 12-year exemption for new construction: buildings with a Certificate of Occupancy issued within the last 12 years are exempt from the rent cap.
- 2040 sunset: the rent cap expires July 1, 2040, unless extended.
Each of these had no Washington-specific statutory floor before HB 1217. A pre HB 1217 lease template that does not reflect these rules now leaves the landlord materially out of compliance.
## Rent cap rules (RCW 59.18.700 series)
The 7% + CPI / 10% cap
RCW 59.18.700 caps rent increases at the lesser of 7 percent plus the regional CPI-U or 10 percent in any 12-month rolling period. The CPI-U used is the Seattle-Tacoma-Bellevue area for the 12 months ending August. The Washington State Department of Commerce publishes the cap each year.
First-year prohibition (RCW 59.18.700)
A landlord may not increase rent during the first 12 months of a tenancy. Renewal at the end of year 1 is the earliest a rent increase may take effect.
12-year exemption for new construction
Buildings with a first Certificate of Occupancy issued within the last 12 years are exempt from the cap. Once the building reaches its 12-year anniversary, the cap applies. Owners must produce documentation of the CO date if challenged.
2040 sunset
HB 1217 includes a sunset clause: the rent cap expires July 1, 2040, unless renewed by the legislature.
Penalties
A landlord who increases rent above the cap is liable for the excess plus reasonable attorney fees. The tenant may also withhold the excess and offset against future rent.
## 90-day rent increase notice (RCW 59.18.140)
Any rent increase, regardless of amount or tenancy type, requires 90 days advance written notice. The notice must: - Be in writing. - State the new amount. - State the effective date (at least 90 days from service). - Identify the property.
Pre HB 1217 the requirement was 60 days. The 90-day rule is non-waivable.
A defective notice (under 90 days, not in writing, or missing required content) makes the rent increase unenforceable until a proper notice is served.
## Security deposit rules (RCW 59.18.260, 59.18.280)
No statutory cap
RCW 59.18 does not cap the amount of a security deposit. A landlord may collect any reasonable amount. Practical custom in Washington is one to two months rent.
Move-in checklist required (RCW 59.18.260)
The landlord must provide a written checklist of the condition of the premises at move-in, signed by both landlord and tenant, before the landlord may withhold any portion of the deposit at move-out. Failure to provide a move-in checklist forfeits the right to withhold.
Deposit handling
The deposit must be held in a trust account in a federally insured banking institution or escrow company, separate from the landlord's own funds. The landlord must provide the tenant with the name and address of the institution.
Return deadline (RCW 59.18.280)
Within 30 days after the tenant vacates, the landlord must return the deposit, or the balance with a written itemized statement, to the address provided by the tenant.
Wrongful withholding penalty
A landlord who fails to return the deposit or provide the itemized statement within 30 days is liable for the amount wrongfully withheld plus up to twice the deposit amount, at the court's discretion, plus reasonable attorney fees.
## Habitability duty (RCW 59.18.060)
Washington has a statutory implied warranty of habitability. RCW 59.18.060 lists landlord obligations, including:
- Comply with applicable building, housing, health, and safety codes.
- Maintain the structural components in good repair.
- Maintain in reasonably good repair the electrical, plumbing, heating, and other facilities and appliances.
- Provide reasonable amounts of hot and cold running water.
- Provide and maintain smoke detectors and carbon monoxide detectors (RCW 59.18.060(13)).
- Provide reasonable heat in cold weather.
The duty cannot be waived in the lease.
## Eviction (Unlawful Detainer, RCW 59.12)
Washington evictions are filed as Unlawful Detainer actions in Superior Court (or District Court in some counties). The procedure is moderately fast (45 to 90 days from notice to writ) and tied to the notice rules in RCW 59.12 and 59.18.
Step 1: serve the proper notice
- 14-day pay-or-quit notice for non-payment of rent (RCW 59.12.030, post 2019 reforms).
- 10-day notice to comply for lease violations other than non-payment.
- 3-day notice for waste, nuisance, or unlawful activity.
The notice must specify the breach and demand cure or possession. The 14-day count excludes weekends and holidays for service purposes.
Step 2: file Unlawful Detainer Complaint
After the notice expires without cure, the landlord files an Unlawful Detainer Complaint and Summons in Superior Court. Filing fee is typically $250 to $300.
Step 3: tenant answer and show cause hearing
The tenant has 7 days to file an answer. If the tenant does not answer, the landlord obtains a default judgment. If the tenant answers, the case proceeds to a show cause hearing.
Step 4: writ of restitution and sheriff lockout
If the landlord prevails, the court issues a writ of restitution. The sheriff schedules a lockout, typically within 5 to 14 days.
Self-help is unlawful
RCW 59.18.290 prohibits self-help eviction. A landlord who changes locks or shuts off utilities without a writ is liable for damages.
## Late fees (RCW 59.18.170, post HB 1217)
HB 1217 Section 108 amended RCW 59.18.170 to cap late fees:
- $75 per month or 1.5 percent of monthly rent, whichever is greater.
- 5-day grace period before the late fee may be charged.
A late fee above the cap is unenforceable. Daily compounding late fees are not allowed. Out-of-state landlords using pre HB 1217 templates with higher late fees are now overcharging.
Federal: - Lead-based paint disclosure for any unit built before 1978.
Washington: - Move-in checklist (RCW 59.18.260) before any deposit is withheld. - Bank where the deposit is held (RCW 59.18.270). - Mold disclosure (RCW 59.18.060(12)) if landlord knows of mold problems. - Voter registration form, in Seattle (Seattle Municipal Code 22.206.180). - Owner and agent for service of process (RCW 59.18.060(15)).
## Seattle Just Cause and other local rules
Seattle layers significant additional rules on top of state law:
- Seattle Just Cause Eviction Ordinance (SMC 22.206.160): just-cause termination required for all tenancies. Landlord must specify one of the eighteen statutory grounds.
- First-in-time tenant screening (SMC 14.08): Seattle requires landlords to consider applicants in the order received.
- Source-of-income discrimination prohibited (SMC 14.08).
- Mandatory voter registration form at lease signing (SMC 22.206.180).
Tacoma and Spokane have additional renter protections.
Three mistakes appear repeatedly in the Washington leases our team audits:
Increasing rent more than HB 1217 allows. Out-of-state landlords using pre HB 1217 leases or thinking Washington has no rent control routinely exceed the 7% + CPI / 10% cap. The excess is unenforceable and exposes the landlord to suit.
Failing to provide a move-in checklist. RCW 59.18.260 requires a written checklist before any deposit deduction. Without it, the landlord cannot withhold any portion of the deposit at move-out, regardless of damages.
Pre HB 1217 late fees above $75 / 1.5%. Generic templates with $50 flat fees may be fine, but $100+ flat or daily compounding fees violate post HB 1217 RCW 59.18.170 and are unenforceable.
## When to consult an attorney
Most of what we cover here is straightforward enough to handle with a good lease and a careful hand on notices. A few situations warrant a Washington-licensed attorney from the start:
- Contested Unlawful Detainer cases, especially with habitability counter-claims.
- Tenant security deposit claims above $1,000.
- Tenant bankruptcy filings.
- Code enforcement actions against the property.
- Any claim involving the Washington Law Against Discrimination or federal fair housing.
- Seattle Just Cause termination disputes.
How much can a Washington landlord increase rent? The lesser of 7 percent plus CPI or 10 percent in any 12-month period (RCW 59.18.700 series, post HB 1217).
Can I increase rent in the first year of the tenancy? No. RCW 59.18.700 prohibits any rent increase in the first 12 months.
How much advance notice do I need to give for a rent increase? 90 days written notice (RCW 59.18.140, post HB 1217).
Are new buildings exempt from the rent cap? Buildings with a Certificate of Occupancy issued within the last 12 years are exempt. The exemption sunsets July 1, 2040.
What is the late fee cap in Washington? $75 per month or 1.5 percent of monthly rent, whichever is greater, with a 5-day grace period (RCW 59.18.170, post HB 1217 Section 108).
How much can a Washington landlord collect as a security deposit? There is no statutory cap. One to two months rent is typical practice.
How long does a Washington landlord have to return the deposit? 30 days from the tenant vacating, with an itemized statement if any portion is withheld (RCW 59.18.280).
Do I have to provide a move-in checklist? Yes. Without a written checklist signed at move-in, the landlord cannot withhold any portion of the deposit at move-out (RCW 59.18.260).
How much notice do I need to evict for non-payment in Washington? 14 days written notice, excluding weekends and holidays (RCW 59.12.030).
If you need a Washington residential lease that includes HB 1217 compliance (rent cap notice, 90-day rent increase form, late-fee cap), the move-in checklist requirement, and Seattle Just Cause addenda, our team's Washington lease at leasekit.io/templates/washington-residential-lease covers it for $29 one-time.